MONTPELIER — The National Weather Service issued warnings of potential flooding for parts of northern and northeastern Vermont on Thursday, which were expected to be in effect until this morning.

Ice jams caused some rivers to rise, and more ice jams could form. Montpelier officials said at mid-day that the major risks had subsided, but Montpelier Fire Department Lt. Mark Tillinghast said city crews continued to monitor water levels.

The state warned those near waterways or in low-lying areas to monitor river levels, keeping in mind water can rise quickly if ice clogs the riverbed. If water begins to rise, those affected should seek higher ground immediately, a news release said.

Firefighters in Montpelier and Moretown said they thought the worst was behind them Thursday afternoon, adding they found no evacuations were necessary.